A small amber bottle with a dropper labeled "Medik8 C-Tetra® (Travel Size)" stands next to its white packaging box on a gray surface, promising brightening skin benefits with its potent antioxidant serum.
A small brown bottle with a black dropper lid labeled "Medik8 C-Tetra® (Travel Size)" rests on a gray surface against a plain background, promising its brightening skin effects as an antioxidant serum.
A brown bottle labeled "Medik8" pours the C-Tetra® (Travel Size) antioxidant serum, enriched with vitamin C for brightening skin, onto a gray surface.
A close-up of a person's hand with six drops of C-Tetra® (Travel Size) by Medik8 being applied from a dropper. The image includes the text "Apply 6 drops.
A dropper with a black cap, partially filled with an antioxidant serum, and a single vitamin C-enriched drop about to fall from its tip against a gray background. The product is Medik8's C-Tetra® (Travel Size).

C-Tetra® (Travel Size)

Lipid Vitamin C Radiance Serum

C-Tetra® (Travel Size)

The original, bestselling C-Tetra serum. A gentle yet effective lightweight vitamin C serum for restoring the appearance of skin radiance and minimising the visible signs of ageing.

Up to 2 months supply from a travel size.

C-Tetra promotes a youthful-looking, glowing complexion. Skin feels immediately soft, supple and smooth.
Vitamin C minimises the appearance of fine lines and wrinkles over time, while helping to visibly balance and brighten the skin tone.
Tetrahexyldecyl Ascorbate (Vitamin C) & Vitamin E
  • Key Benefits
  • How It Works
  • How To Use
  • Ingredients
  • Used in Professional Treatments
  • The Science Behind


Restore radiance and fight signs of ageing with C-Tetra, a vitamin C antioxidant serum that protects against environmental stressors while brightening skin.